2014 Crain's Guide to Networking: Six great tech groups

Where and when: Monthly atop cleverbridge's rooftop deck in River North (see pictures)

How to get in: Contact Mr. Vodnik. You must be invited, but there's no formal program or application process for this low-key after-work party; it's just a chance to relax with other techies while enjoying the view from the cleverbridge deck.